10-Letter Words Containing: F,Y,C,E

• have or develop complicating consequences

• make complex

• the ratio of the output to the input of any system

• skillfulness in avoiding wasted time and effort

• any of a large group of small songbirds that feed on insects taken on the wing

• large American birds that characteristically catch insects on the wing

• the trait of being effeminate (derogatory of a man)

• a lack of efficacy

• in an affected manner