6-Letter Words Starting: OS

• become bony

• make rigid and set into a conventional pattern

• cause to become hard and bony

• large harmless hawk found worldwide that feeds on fish and builds a bulky nest often occupied for years

• surgical procedure that creates an artificial opening for the elimination of bodily wastes

• a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known

• any fern of the genus Osmunda: large ferns with creeping rhizomes; naked sporangia are on modified fronds that resemble flower clusters

• A small opening or orifice, as in a body organ or passage.

• Any of the small openings or pores in a sponge.

• The mouth of a river.

• of or relating to the songbirds

• passerine bird having specialized vocal apparatus